App notifications are shown in a pane accessed by dragging down from the top of your home screen. They could entail weather or news updates, emails, messages, downloads and social network updates – so if you hear your device make funny noises, check your notifications as something important may have
come in. You can clear your notifications pane by tapping the stack icon at the top right. If you tap on an item in the pane, you’ll jump straight to the app in question to reply to messages and respond to other things applicable to the notification. Go to the Apps section in Settings to enable/disable notifications for specific apps.